TechPowerUp published a review on the HarmonicDyne P.D.1 In-Ear Monitors
A quote from the article:
HarmonicDyne is Linsoul's second house brand, with an emphasis on headphones. Its latest product, the P.D.1, is actually a set of IEMs that boasts a hybrid setup of dynamic drivers and a planar magnetic driver which promises a lot with premium accessories, great build quality, and tuning we put through the paces today!HarmonicDyne P.D.1 In-Ear Monitors Review